Preparation and the Catalytic Properties of Attapulgite / TiO2 Nanocomposites

With the rapid development of industry, the discharge of textile printing and dyeing wastewater will cause serious pollution to other pure water bodies. It is imperative to deal with textile printing and dyeing wastewater. In this paper, with titanium tetrachloride as a precursor, attapulgite (ATP) / TiO2 nanocomposites were prepared by a neutralizing hydrolysis method and their catalytic activities were investigated by the oxidative degradation of methylene blue dye using ozone as oxidant. The test results showed that there were significant interactions between TiO2 and ATP support. The effects were also studied of ozone concentration, catalyst amount, reaction temperature, and initial concentration of methylene blue on the degradation rate of methylene blue catalyzed by the prepared attapulgite / TiO2 nanocomposites, and under the optimal conditions, the methylene blue could be degraded more than 90% in 30 minutes. Compared with that of pure ATP, the catalytic activities of ATP / TiO2 nanocomposites were enhenced remarkably. The degradation mechanism of methylene blue was also discussed.

In Depth Assessment on Digital Textile Printing Environment as the Concrete Path of Making Indonesia 4.0

Textile-garment industry in Indonesia has been established as the primary industry and economy that becoming fundamental to nation’s wealth. Well known as a top 5 of global market supplier, this industry predicted to keep score and improving their productivity to reach better position. In last 2019, Government of Indonesia already announced the roadmap plan of Indonesia 4.0, which put textile-garment industry as the one of priority industry that will be essentially adopting digital equipment and workflow to keep competitive and becoming the backbone of national industry alongside with other 4 industries mentioned. With this initiative being deployed and how the road map plan already announced, Author want to elaborate, assess and analyse how ready is digital adoption on textile-garment manufacturers, specifically on digital printing workflow. So on, this research will be titled “In Depth Assessment on Digital Textile Printing Environment as the Concrete Path of Making Indonesia 4.0”. The main purpose of this research is to give the clear picture of how ready textile-garment industry Indonesia to fulfil both of extensive demand from domestic and global market by adopting digital equipment, in this research digital textile printing. By elaborating all the considerations and factor, we are hoping that there would be identified root issues beneath of this industry and directly formulating the best approach and solution for this industry.

Synthesis of High-Performance Aqueous Fluorescent Nanodispersions for Textile Printing—A Study of Influence of Moles Ratio on Fastness Properties

Aqueous fluorescent dispersions containing dyed acrylic-based copolymer nanoparticles possess significant credentials concerning green technology as compared to those prepared with the conventional vinyl-based monomers in textile and garment sectors; however, their essential textile fastness properties are yet to achieve. In the present work, a series of acrylic nanodispersions were synthesized by varying the moles ratio of benzyl methacrylate (BZMA), methyl methacrylate (MMA), and 2-hydroxypropyl methacrylate (HPMA) monomers. This was done to study their effect on dye aggregation and dyed polymer particles agglomeration. FT-IR spectral analysis showed the formation of polymer structures, while Malvern Analyzer, Transmission Electron Microscopy, and Scanning Electron Microscopy analysis suggested that the particles are spherical in shape and their size is less than 200 nm. The obtained nanodispersions were later applied on cotton fabrics for the evaluation of wash fastness and colour migration. Premier color scan spectrophotometer and zeta potential measurement studies suggested that colour migration of printed cotton fabrics increased with an increasing agglomeration of particles and it was also observed to increase with the moles ratio of MMA and zeta potentials.

Efficient removal of ammoniacal nitrogen from textile printing wastewater by electrooxidation considering the effects of NaCl and NaOCl addition

In this study, electrooxidation (EO) process using graphite electrodes as electrode pairs was used for the removal of chemical oxygen demand (COD), ammoniacal nitrogen (NH4+-N), and color from real textile printing wastewater. The effect of solution pH, sodium chloride (NaCl) dosage, sodium hypochlorite (NaOCl), which is the oldest and still most important chlorine-based bleach, dosage, and oxidation time were investigated on the removal efficiencies. Operating conditions of EO reactor were applied to current density 1 mA/cm2, distance between the electrodes: 2 cm, 150 min operation time, and stirring speed of 500 rpm. At optimum condition; pH 9.5, applied current desitiy 1 mA/cm2, NaCl dosage of 8 g/L, NaOCl dosage of 44.4 mg/L and 150 min electrooxidation time, the obtained removal efficiencies were 86.5% and 91.1% for COD and ammoniacal nitrogen, respectively. The efficiency was enhanced to 91.1% for ammoniacal nitrogen from 21.7% after applying EO combined with NaOCl addition compared to individual NaOCl addition.